Previous research suggests that favorable health outcomes among Mexican immigrants reflect high levels of social support in enclave communities with high co‐ethnic density. This study examines the mortality outcomes of Mexican immigrants in the United States in traditional gateways versus new and minor destinations. Mexican immigrants in new and minor destinations have a significant survival advantage over those in traditional gateways, reflecting less established communities in new destinations. This finding casts doubt on the protective effects of enclaves, since non‐traditional destinations have less established immigrant communities. Future research should reevaluate the relationship between community ethnic composition, social support, and immigrant health.